You're operating on the same assumption that I had to correct idiom on, and it is the presumption that God will change His mind about what sin is. What evidence do you have that has ever occurred or will ever occur? God does not change on what constitutes immorality, so it seems moot for you to suggest otherwise. There is no reason to expect the sovereign, almighty God to change His standards of what is right and wrong, especially when we consider that which is morally good is based on God's character and nature.
Evil is not a thing in and of itself, but it is simply the absence of good. Since God is omnibenevolent, it is impossible for goodness to ever leave His character. Therefore, God will not change His mind about immoral acts, such as murder and homosexuality, because it is metaphysically impossible for Him to do so of his own perfectly moral nature. That needs to be grasped fully.
